A t-z approach for the design of axially loaded piles in consolidating soil
A t-z approach for the design of axially loaded piles in consolidating soil
This paper presents a t-z model for the analysis of vertically loaded single piles in consolidating soil, using a beam on hyperbolic vertical springs whose tangent stiffness is a function of the normalised mobilised stress in the soil (affected by the consolidation-induced increase in effective stresses) and load history (accounting for loading, unloading and reversed loading). The validation is carried out with published experimental and analytical results. Next, a parametric study illustrates, for floating and end-bearing piles, the temporal evolution of settlement and neutral plane, considering with a simplified approach both displacements and non-displacement piles. Contrarily to end-bearing foundations, the neutral plane location of floating piles is sensitive to the temporal evolution of excess pore water pressure; thus, for the analysis of floating piles, t-z springs with a constitutive law dependent on effective stress should be adopted.
A. E. Detlefsen; A. Franza; K. K. Sorensen
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
A - New developments on structural design
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